Hairstylist Ashley Javier's cute pup keeps an eye on the accessories for the evening.

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Morgan had her pick of three too-cool leather jackets.

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From braids to buns, no 'do was off-limits—Morgan (and her multicolored hair!) was ready for anything "There are a bunch of different possibilities. We're just going to play around and see where it takes us!" he explained.

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"In middle school, I went through a hair dying phase. It was red for awhile! But that's the most 'punk' thing I've done," says Morgan. "My hair is dyed like this because I just finished filming a movie. It's called Jamie Marks Is Dead and stars Cameron Monaghan from Shameless, Noah Silver, who's this awesome French kid, Judy Greer, and Liv Tyler."

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Morgan chose a punky cosmetic-print dress, which was one of seemingly "hundreds" of options. "I tried on, like, ten dresses. I like this one because it's interesting!"

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Morgan loved her edgy hair for the event, but she chose a simpler 'do for senior prom. "I just wore it straight! It was very chill," she said.

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Morgan was jazzed about her shoe options. The custom Thom Browne oord were a stand-out, but the 3.1 Phillip Lim booties stole her heart. "I like mod and anything the word 'classic' entails," she explained of her style.

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The final look.

Celebrity Style

Morgan Saylor Makes Her Met Gala Debut: We Tag Along with the 'Homeland' Star

We prepped for the Costume Institute Ball with the budding actress.

Last week, Morgan Saylor was getting ready for her senior prom. Days later, the 18-year-old Homeland star was on her way to the Costume Institute Gala—a rite of passage of a very different sort. Though she's walked her fair share of red carpets already (who could forget that incredible Golden Globes gown?), this year marked her Met Ball debut.

For prom, she wore a mini dress from Asos and understated makeup she did herself. The Met Ball, on the other hand, called for a whole team of professionals. (Though with her perfect skin and rad ombré hair, she certainly didn't need them!) Teen Vogue fashion news director Andrew Bevan helped Morgan choose her lipstick-print Holly Fulton frock, while hairdresser-to-the-stars Ashley Javier spun her golden locks into a 'do worthy of a punk princess—complete with makeshift headband finagled from safety pins.

In a few weeks, Morgan will graduate from high school with her best friends, and then she'll go back to filming Homeland with her award-winning cast. But for the night, she was the belle of the Met ball.

Click on to find out how she chose her dress, shoes, and that totally cool safety-pin headband!